LOL @ AA sizes.
Nope, this isn't the massive sizing blog (which I haven't been working on in a while since I've been on various holidays for about a month)... just a quick observation.
According to the size charts, Girly XL should be too small for me. In fact I wear a Girly L which is still incredibly baggy around my waist. And just out of curiosity, a few minutes ago I tried on the Girly S I bought for a friend of mine - and it fit me! Quite snugly, yes, but not even indecently tight. Just goes to show: size charts are weird.